What profitable values should be edited in the exchange-pay-bitcoincash-core.conf

"Mining":
   {
      "maximum exchange rate": 0.000698,
      "minimum exchange rate": 0.000694,
      "exchange requests per hour": 120,
      "exchange request minimum amount": 100,
      "exchange request maximum amount": 1000,
      "minimum CredaCash balance": 10,
      "minimum BCH balance": 0.001,
      "skip autopay test": false

Maybe my max/min rate is not correctly set, please help!